Fabrication and Characterization of Closed-Cell Rubber Foams Based on Natural Rubber/Carbon Black by One-Step Foam Processing

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• 作者：Ali Vahidifar ; Saied Nouri Khorasani ; Chul B. Park ; Hani E. Naguib ; Hossein Ali Khonakdar
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：March 2, 2016
• 年：2016
• 卷：55
• 期：8
• 页码：2407-2416
• 全文大小：621K
• ISSN：1520-5045

文摘

A novel one-step compression molding was proposed and successfully employed for preparation of closed-cell foams based on natural rubber (NR)/carbon black (CB) composite. The uniqueness of this new method was that both the foam density and expansion ratio became independent of the CB content. The rheometrical findings indicated that the increase in the CB content from 0 to 20 phr yielded a 0.91 and 3.51 N m increase in the initial and the final torque, respectively. The SEM results demonstrated that the prepared foam had three different layers including the skin, transition, and core layers. Almost 14-fold enhancement of the cell density (from 8 to 117 cells/cm³) was obtained by increasing the CB content in a constant foam density. Although, curing properties, cell morphology, and mechanical properties of the foam improved by increasing the CB content, the gradual deterioration was observed for sound absorption properties.